That man was Robert Baker -- a respected junior high school science teacher and coach in Norwood.

"He wanted me to see his Christmas tree. And he sat behind me on the couch and he put his arms around my waist. And I panicked. I froze," Clemens told 5 Investigates' Karen Anderson.

"He said, 'There is something I need to tell you and you don't have to respond, but I have to share it. I have somehow fallen in love with you,'" Clemens said. "We went to leave his house and he just turned around and kissed me. It was one simple five-second kiss."

Andrea said that Baker swore her to secrecy. Soon his behavior changed.

"That slow pace thing quickly turned into such an aggressive, sexually abusive man, that I was terrified. All the time, and I had no voice to say no," Clemens said.

Andrea said she couldn't break free from Baker until after college when she moved to Florida.

Years later, fearing there may be other girls like her, Andrea said she called her old principal and told him the story. She said she didn't hear anything until eight months later when she got a call from Norwood police.

Police were filing statutory rape charges against Robert Baker. The victims were two other teenage girls.

Baker was never charged with a crime related to Clemens, but her coming forward helped bring down the once-popular Norwood educator.

"People did not believe these girls, and then people started hearing about a third former student - me - had come forward and then the seed was planted," Clemens said.

Baker pleaded guilty to indecent assault and rape and abuse of a child in 2002. He's now a Level 3 sex offender. For Andrea, the case was a turning point.

"What if I had come forward, could they have been spared? And that is what fueled me to start speaking out -- that very moment," she said.

5 Investigates found in recent years, on average, the licenses of 15 Massachusetts educators are suspended each year for sexual misconduct. But there aren't always charges. When students are 16 or older, by law, it's not considered a crime.

"The age of consent is not a defense. Because in my case I had been groomed for two years, and he didn't kiss me until the week after I turned 16," Clemens said.

Clemens is working with advocates to change state law, including a measure making sex between a teacher and student a crime up until the age of 19.